Nice video clip, AMIGASYSTEM ... but pretty useless as a bugreport
Please, upload your startup-sequence and user-startup as txt-files.
Make a list of all patches and third-party libraries installed on your system.
What is in your WBStartup drawer ?
What is the Guru number that appears ??
Do you use MUI 4.x ? Set the stacksize to 50000 at least.
Make sure that MemTrailer is installed in your startup-sequence as the last command before endcli!
Without MemTrailer AfA_OS or AmiKit can be very unstable. (Use a trailer size of 32, 64 or 96 if WarpOS is also running)